package com.changgou.filter;

import com.changgou.utils.JwtUtil;
import io.jsonwebtoken.Claims;
import org.apache.commons.lang.StringUtils;
import org.springframework.cloud.gateway.filter.GatewayFilterChain;
import org.springframework.cloud.gateway.filter.GlobalFilter;
import org.springframework.core.Ordered;
import org.springframework.http.HttpHeaders;
import org.springframework.http.HttpStatus;
import org.springframework.http.server.reactive.ServerHttpRequest;
import org.springframework.http.server.reactive.ServerHttpResponse;
import org.springframework.stereotype.Component;
import org.springframework.web.server.ServerWebExchange;
import reactor.core.publisher.Mono;

/**
 * 老大哥在看着你
 *
 * @author ANG.YU
 * @date 2019-10-07 15:43
 */
@Component
public class LoginGlobalFilter implements GlobalFilter, Ordered {
    public static final String ADMIN_LOGIN = "/admin/login";
    private final String TOKEN = "token";
    @Override
    public Mono<Void> filter(ServerWebExchange exchange, GatewayFilterChain chain) {
       ServerHttpRequest request = exchange.getRequest();
        ServerHttpResponse response = exchange.getResponse();
        if (!ADMIN_LOGIN.equals(request.getPath())) {
            System.out.println(request.getPath());
            HttpHeaders headers = request.getHeaders();
            String token = headers.getFirst(TOKEN);
            if (!StringUtils.isEmpty(token)) {
                try {
                    Claims claims = JwtUtil.parseJWT(token);
                } catch (Exception e) {
                    response.setStatusCode(HttpStatus.UNAUTHORIZED);
                    return response.setComplete();
                }
            } else {
                response.setStatusCode(HttpStatus.UNAUTHORIZED);
                return response.setComplete();
            }

        }
        return chain.filter(exchange);

    }

    @Override
    public int getOrder() {
        return 0;
    }
}
